Lock-valve.



A. G. KOPPE.

LOCK VALVE. APPLICATION FILED MAR. I9, 1917.

Ij., Patenmpt. 18,1917.

nniann sfrafrns rarnnfr onmon i ADOLPI-I `Gr. KOEPIE, OF'PALIVIYRA, ILLINOIS.

rentree.

To all whom t may concern Y Be it known that I, AnoLPH G. KoEPrE, a citizen of the United States, residing at Palmyra, in the county of Macoupin and State of Illinois, have invented certain new and useful Improvements in Lock-Valves; and I herebydeclare that'the following is a full, clear, and exact description thereof, reference being had to the accompanying draw-` ings, which form part of this specification. l

`'lhisinvention is a novel improvement in valves or stop cocks useful for various purposes, and which it is desiredto have locked in either closed or open position.` The obrefer to the claims for summaries of theV essential features andV combinations of parts ject of the present invention Ais to providea novel self-contained self locking valve; which is locked preferably in both its closed and open positions but whichcan be unlocked by `the insertion of a proper key,

which key may also serve as a means for turning the stem, the valve being unlocked in` either closed or open `positions when the key is inserted, and being'f lockedin either position when the keyis removed.

l will explain the invention with reference to `the accompanying drawings which illustrate one practical embodiment thereof and forV which protection is desired.

'In said drawings y y Figure 1 is a vertical sectional elevation of the lcomplete valve.

2 is a horizontal section on the line Fig. 3 is a horizontal section on the line 3-3 Fig. 1.

Fig/Ll is a detail section ylike the `upper part ofFi'g. 1, showing how the valve stem,

" being suitably `internally threaded at the ends of this passage for connection with pipes in the usual manner.Y The casing also has a transverse bore 1b which intersects the water-way, and which is preferably tapered for the reception of a valve member `2 which" has a passage 2a adapted in one position of the valve member to register with the passage 1EL to permit flow of fluid through the valve; 'but if the valve member is given a against rotative movement.

j i tocxvALvE.

i `Specification of Letters Patent. Patejntd Spt, 1S, 1191"?,

i Applicfioll'led March 19, 1917.` `Serial N0. 155,870. i

quarter turn the passage 2a will be moved entirely out of register with the opening 1 and thevalve will be closed. -Y The valve member 2 has a stem 2b which extendsinto the T 1c of the easing, which T may form part of or be rigidly secured to the casing 1 in any convenient manner.

The stem 2b enters a bushing 3 which is fitted within the T 1C` and has a reduced threaded inner end 3?' engaging the correspondingly l internally threaded upper end of the'bore 1b as shown in the drawings.` The bushing 3 practically fills the T 1c, but has a central bore to accommodate thestem 2b ofthe valve-member.

The valve stem 2b `has a vertical key slotV Qcfor the insertion of a master key 9 as indicated in Fig.` 1. And communicating with the key slot 2c in the stem are, preferably, a plurality of `radially disposed slots 2e in which are tumbler members 2f. i Preferably at least three tumblers 2f are provided as shown, this number however may be varied. These tumbler members are adapted to project into the key slot 2 `as indicatedr in Fig. l when the key is withdrawmbeing thus projected into the key slot by the action of locking tumblers 3f or 4f hereinafter referred to.`

The bushing 3 is also provided with a set of radial bores Se; preferably corresponding `in number and position with the bores 2e in `the stem 2b, and adapted to register with the slots 2e when the valve is closed.` Within each of the bores 3e is a tumbler 3f which is projected inwardly by suitable means such as a spring 3g interposed `between the tumbler and the wall of the T 1c, or the outer end offthebore, so that the tumblers 3f are normally pressed inward toward the stem, and when thestem isturned so that the bores 2e registerwith the bores 3f the springs 3g project the tumblers 3f inward into the bores 2e as indicated inFig. 2 and move the tumblers 2f inward so that they partially project into the key slot 2C as indicated in Fig. l and in such position the tumblers 3f will lock the stem 2f and the valve member The tumblers 3f are arranged at such a point that they will lock the valve in open position.

The bushing 3 is, preferably, provided with another set of radially disposed bores 4e corresponding to the bores 3e but removed about 45 degrees therefrom. In these bores 4f are plungers 4f, corresponding to the plungers 3f, and springs 4g, corresponding to springs 3g, so that when the valve-member is turned to closed position and the key removed the valve-member will be locked in closed position by the tumblerstf.

"The key 9 is preferably provided with projections 9a which when the key is properly inserted in the slot 2c will respectively engage the inner ends of the tumblers 2f and force them radially outward together with the opposed tumblers 3f, (or 4f) as indicated in Figs. l and 3 operatively disengaging the tumblers 3f or if from the stem 2b so that said stem can be turned, while the key is in position therein, from lockedfto open position, or vice versagbut when the stem is properly turned and the key withdrawn ythe stem will be locked in either closed or open position according to its position at the time the key was withdrawn.

Suitable stops may be providedto limit the rotative movement of the stem and valve 2 and to insure that when it has made the proper movement the tumblers 2f will be in register either with the tumblers 3f or 4f, according to the position of the valve. Any suitable stop may be employed. For convenience I have shown the stem 2b as provided with a stop pin 2S which projects into a slot 3S in the bushing 3, this slot extending a radius of 45 degrees so that when the stem is turned until the pin Qsengages one end of the slot the valve will be arrested in open position, and when the stem is turned until the pin engages the other end of the slot the valve will be arrested in closed position.

It will be understood from the foregoing description and drawings that the valve is locked in either and both open and closed positions if the key is removed. It willbe unlocked when the proper key is inserted in the stem and such key may be used to turn the valve. The number of' locking tumblers employed may be varied to suit the wishes of the manufacturer so that each lock may require its own peculiar key if desired. Further it is obvious that various changes may be made in form and embodiment of the several elemental parts of the invention while retaining the essential fea tures thereof A packing 5 or gasket is preferably placed around the stem between the upper end of the .v-alve and the inner end of the bushing 3 as indicated in Fig. l to prevent leakage of fluid.

I claim: 1

l. In a lock valve, the combination of a body having a longitudinal passage, a transverse bore and an annular flange surroundingthe outer end of said bore, said flange being threaded bothinternally and externally; a bushing having a reduced threadportion of said body iiange; with a rotatable valve in said bore provided with an integral axial stem fitted in the passage in said bushing, said stem having avertical key slot and a plurality of radial openings communicat ing therewith adapted to register with the openings `in the bushing; and tumblers in said stem openings adapted to be engaged and projected by a key inserted in the slot, substantially as described.

2; In a lock valve, the combination `of a body hav-ing a longitudinal passage, a transverse bore, and an annular flange surround-` ing the outer end of said bore, said Hange being threaded both internally and eXternally; a bushing havinga reduced threaded end engaging the interior threads -of said flange, and an axial passage alined with the"` bore and a radial transverse slot extending through one quarter of its circumference, and a series of radially disposed openings; tumbler-s in said openings; s' rings adapted to move said tumblers inwardly; and a oasing tted to and inclosing the busliingand having its lower Vend fastened to the exterior threaded portion of said vbody flange; with arotatable valve located within saidfbore and provided with an integral axial stem fitte-d in the-passage in said bushing, said stem having a vertical key slot and a plurality of radial openings communicating therewith adapted to the register withlthe openings in the bushing; tumblers in saidxstem openingsadapted to beengaged and4 projected by a key inserted in the` slot, `and a pin on said valve stem engagingthe .slot

in theA bushing to limit the rotatorial move-l ment of said stem.

In testimony that vIclaim the foregoing as my own, I affix my signature.

ADoLPH e. Konrrn. Y

copies of this patent may be obtained for ve cents each, by addressing the Gommissiener `of Patents,

' Washingtolt. 0. 

